The interaction between plant growth regulator (PGR) and nitrogen application in early-sown first wheat

2015

Research organisatons
Funding source

Trial details

Researcher(s) Nick Poole (FAR Australia)
Michael Straight (FAR Australia)
Year(s) 2015
Contributor Riverine Plains
Trial location(s) Dookie, VIC
The interaction between plant growth regulator (PGR) and nitrogen application in early-sown first wheat locations
Aims

To investigate the interaction between plant growth regulator (PGR) and nitrogen application in early-sown first wheat.

Key messages
  • With an average yield of almost 3t/ha, increasing the rate of nitrogen applied (40 and 80 extra kg N/ha) did not affect dry matter (DM) accumulation, crop height or fianl yield of first wheat following canola.
  • Applying a plant growth regulator (PGR) decreased crop height, but did not influence DM or grain yield.
  • Although differences were small, PGR application significantly decreased screenings and increased test weight.
  • Applying the PGR also decreased crop reflectance, measured as normalised difference vegetation index (NDVI) during stem elongation (GS39); a result also observed during 2013 and 2014.
  • The lower NDVI readings suggest PGR altered greeness of the crop canopy or the orientation of the leaves, decreasing crop reflectance.
Lead research organisation Commonwealth Scientific and Industrial Research Organisation
Host research organisation N/A
Trial funding source GRDC
Related program Maintaining profitable farming systems with retained stubble
Acknowledgments

Thanks to the farmer co-operator, Mark Harmer (Dookie, Vic).


Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Fertiliser: Rate
Trial type Experimental
Trial design Replicated

Dookie 2015

Sow date 19 May 2015
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Other trial notes

GSR (Apr-Oct)

Download the trial report to view additional method/treatment information

Download results

Trial results Effect of nitrogen rate on grain yield, protein, screening and hectolitre weight at Dookie in 2015

# Treatment 1
Hectolitre weight (kg/hL) Screenings (%) Protein (%) Grain yield (t/ha)
1 Standard N 79.7 12.5 17 3.05
2 Standard + 40kg N/ha 79.1 15.7 17.2 2.96
3 Standard + 80kg N/ha 80.6 8.4 17.2 2.86

Grain yield t/ha


Loading

Hectolitre weight kg/hL


Loading

Protein %


Loading

Screenings %


Loading
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Dookie, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Dookie, VIC Sodosol
Soil Moisture Source: BOM/ANU
Average amount of water stored in the soil profile during the year, estimated by the OzWALD model-data fusion system.
Year Dookie VIC
2015 153.8mm
2014 168.0mm
2013 169.5mm
2012 202.6mm
2011 236.0mm
2010 251.3mm
2009 194.9mm
2008 248.4mm
2007 238.2mm
2006 267.3mm
2005 304.7mm
2004 298.6mm
2003 350.4mm
2002 334.5mm
2001 388.8mm
2000 413.1mm
National soil grid Source: CSIRO/TERN
NOTE: National Soil Grid data is aggregated information for background information on the wider area
Actual soil values can vary significantly in a small area and the trial soil tests are the most relevant data where available

Soil properties

Loading

Climate

Dookie VIC 2015


Observed climate information

Rainfall trial gsr (mm) 233mm

Derived climate information

Dookie VIC

Loading
Loading
Loading

Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.

Trial report and links

2015 trial report



Trial last modified: 28-11-2019 13:06pm AEST